EUTECH INSTRUMENTS COND 6 PLUS, Salt 6+, TDS 6 PLUS, Cond 6+, TDS 6+ Instruction Manual

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Instruction Manual

Cond 6+ Conductivity/Temp

TDS 6+ TDS/Temp

Salt 6+ Salinity/Temp

68X243635

Rev 0 02/09

Part of Thermo Fisher Scientific

Preface

This manual serves to explain the use of the Conductivity, TDS, and Salinity handheld
meters. The models covered are the CON 6+, TDS 6+, and Salt 6+.

This manual functions in two ways: first as a step by step guide to help you operate the
meter; second, it serves as a handy reference guide.

This manual is written to cover as many anticipated applications of the Conductivity,
TDS, and Salinity handheld meters as possible. If there are doubts in the use of these
meters, please do not hesitate to contact the nearest Eutech Instruments Authorized
Distributor.

Eutech Instruments will not accept any responsibility for damage or malfunction to the
meter caused by improper use of the instrument.

The information presented in this manual is subjected to change without notice as
improvements are made, and does not represent a commitment on the part of Eutech
Instruments Pte Ltd.

Copyright © 2009

Eutech Instruments Pte Ltd

Rev. 0 02/09

Table of Contents

1. INTRODUCTION........................................................................1

2. GETTING STARTED..................................................................2

2.1 Description of Keypad Functions.................................................................2

2.2 Description of LCD Annunciators.................................................................3

2.3 Inserting & Removing the Rubber Armour / Stand.......................................4

2.4 Inserting New Batteries ...............................................................................4

2.5 Battery Replacement...................................................................................5

2.6 Electrode Information ..................................................................................5

2.7 Connecting the Electrode ............................................................................6

2.8 Switching the Meter On...............................................................................7

2.9 Changing Mode...........................................................................................8

3. CALIBRATION...........................................................................9

3.1 Important Information on Meter Calibration .................................................9

3.2 Preparing the Meter for Calibration..............................................................10

3.3 Selection of Auto or Manual Calibration (COND 6+)....................................10

3.4 Using Automatic Calibration (COND 6+)......................................................11

3.5 Manual Calibration ......................................................................................13

3.6 Temperature Calibration..............................................................................14

4. MEASUREMENT .......................................................................15

4.1 With Automatic Temperature Compensation (ATC).....................................15

4.2 Without ATC (Manual Temperature Compensation)....................................15

4.3 Taking Measurements.................................................................................16

4.4 Using Manual Ranging Function (COND 6+, TDS 6+).................................16

4.5 HOLD Function............................................................................................18

5. ADVANCED SETUP FUNCTIONS............................................18

5.1 Advanced Setup Overview ..........................................................................18

5.2 Select Cell Constant (COND 6+, TDS 6+ only)............................................20

5.3 Automatic Calibration (COND 6+ only) ........................................................20

5.4 Setting the TDS Factor (TDS 6+ only).........................................................21

5.5 Temperature Coefficient..............................................................................21

5.6 Normalization Temperature.........................................................................22

5.7 Single-Point Calibration (COND 6+, TDS 6+ only).......................................22

5.8 Restore Factory Default Values...................................................................23

6. PROBE CARE AND MAINTENANCE.......................................23

7. TROUBLESHOOTING...............................................................24

8. SPECIFICATIONS / FEATURES...............................................25

9. CONDUCTIVITY THEORY.........................................................27

10. CALIBRATION TIPS..................................................................29

11. CALCULATING TDS CONVERSION FACTOR ........................30

12. CALCULATING TEMPERATURE COEFFICIENTS..................31

13. REPLACEMENTS AND ACCESSORIES..................................32

14. WARRANTY ..............................................................................33

15. RETURN OF ITEMS ..................................................................33

Instruction Manual COND 6+, TDS 6+, SALT 6+

-1-

1. INTRODUCTION

Thank you for purchasing the COND 6+, TDS 6+, or SALT 6+ meter. These
microprocessor-based handheld meters are economical and easy to use. It has a large
custom LCD (Liquid Crystal Display) for clear and easy reading.

The Cond 6+ measures conductivity (µS/cm or mS/cm) and temperature (°C) while the
TDS 6+ measures total dissolved solids (TDS) in parts per million (ppm) or parts per
thousand (ppt) and temperature (°C). Each measures up to 5 different ranges and can
automatically switch to appropriate measuring range.

The Salt 6+ measures salinity (as NaCl) in % salt or ppt and temperature (°C).

Your meter includes an electrode (cell constant K = 1.0) with built-in temperature sensor
(ECCONSEN91B), rubber armour, 4 alkaline “AAA” batteries, instruction manual and
warranty card.

Please read this manual thoroughly before operating your meter.

To order other accessories and buffer standard solutions, please refer to the
accessories section for more information.

Instruction Manual COND 6+, TDS 6+, SALT 6+

-2-

2. GETTING STARTED

2.1 Description of Keypad Functions

Your meter has 6 keys on its splash-proof keypad. Some
buttons have multiple functions depending on the mode of
operation.

ON/OFF Powers meter on and off. Meter starts up in the

measurement mode that you last switched off
from.

CAL Enters into calibration mode. Pressing while in

calibration mode will abort calibration without
confirming value.

MODE Selects desired measurement mode. When pressed simultaneously with

ON/OFF, it will take you into the SETUP mode. See ADVANCED SETUP
section for more information.

HOLD Freezes measured reading. Press again to resume live reading.

ENTER Confirms calibration value in calibration mode and confirm selections in

SETUP mode.

 Increment values during calibration mode or scroll through SETUP.

Activates manual ranging function during conductivity / TDS measurement.

 Decrement values during calibration mode.

Instruction Manual COND 6+, TDS 6+, SALT 6+

-3-

2.2 Description of LCD Annunciators

Your meter has a large custom LCD that consists of 4-digit segments plus annunciators
for uS/mS (Cond 6+), ppm/ppt (TDS 6+), or ppt/% (Salt 6+) and °C (temperature).

pptm

HO LO

%

m

S

µ

1

2

3

4

5

67

C°

1. Primary display

2. Parts per million (ppm) (TDS 6+ only).

Parts per thousand (ppt) (TDS 6+ & Salt 6+ only).

3. Milli-Siemens/cm (mS) or micro-Siemens/cm (µS) indicator (Cond 6+ only).

4. Temperature indicator.

5. Percentage indicator for temperature coefficient or % Salinity (Salt 6+ only).

6. “LO” = low battery condition.

7. “HO” = HOLD function is activated and reading is frozen.

Instruction Manual COND 6+, TDS 6+, SALT 6+

-4-

2.3 Inserting & Removing the Rubber Armour / Stand

1. To remove meter from rubber armour, push out from the bottom edges of meter until
it is completely out of boot. Ensure that your electrode cables are not connected.

Figure A.

2. To insert meter into armour, slide in from the top of meter before pushing the bottom
edges of meter down to set it into position. Lift up the stand at the back of meter for

bench top applications if necessary. Figure B.

2.4 Inserting New Batteries

The battery compartment is found at the back of instrument. To open the battery
compartment, push in the direction of arrow and lift up the cover. Note the polarity of
battery before inserting into position. After replacement, place cover back and press
down until it locks.

Figure A Figure B

Instruction Manual COND 6+, TDS 6+, SALT 6+

-5-

2.5 Battery Replacement

A “LO” annunciator in the LCD alerts you when battery power is running low. See below.

LO

S

µ

"LO" Battery Condition

Caution: Power off the meter when changing battery.

2.6 Electrode Information

Your meter includes an electrode with a BNC connector (EC­CONSEN91B) having a nominal cell constant of k = 1.0, and a built-in
temperature sensor. The Ultem-body housing has good chemical
resistant properties. The electrode design offers fast temperature
response and reduces air entrapment, ensuring accurate, repeatable,
and stable readings.

The wettable materials of the probe include:

1. Polyetherimide (Ultem) – protective probe guard

2. Polybutylterphalate (Valox) – sensor housing

3. Stainless Steel (SS 304) – 2 steel bands

The protective probe guard can be removed temporarily for
maintenance but must be re-attached during measurement and
calibration. Erroneous results will occur while the probe guard is
removed.

Always immerse the probe beyond upper steel band for best results.
Use the fill line on the outside of the probe guard for reference.

Instruction Manual COND 6+, TDS 6+, SALT 6+

-6-

1. DO NOT measure or calibrate without the protective

probe guard in place.

2. Immersion above the protective guard is not

recommended. The cable can be submerged briefly
but is not designed for continuous immersion.

See “Probe Care and Maintenance” for more information.

2.7 Connecting the Electrode

1. To connect electrode, align the connector slots with

the posts of meter’s socket and rotate connector
clockwise until it locks.

2. To remove, rotate the connector in anti-clockwise direction until it unlocks, and

slide the connector off the socket.

3. Insert the mini phono jack of temperature sensor into the socket on the meter as

shown below.

BNC connector 2.5 mm mini phono

for temperature

Instruction Manual COND 6+, TDS 6+, SALT 6+

-7-

2.8 Switching the Meter On

Press ON/OFF to power up your meter. Your meter will cycle through various setup

parameters when switched on.

1. The first screen shows the model [Con6] [tdS6] [SAL6].

2. The second screen shows the nominal cell constant value. The Cond 6+ and TDS

6+ meters can accept electrodes with k = 0.1, 1.0 or 10.0 nominal cell constants.

The Salt 6+ can be used with 1.0 only. Default value is k = 1.0 [C 1.0].

See Section 5.2 Advanced Setup to modify.

3. The third screen shows the Normalization Temperature which can be set to 25 °C

or 20 °C. Default value is 25 °C [t 25.0 °C].

See Section 5.6 Advanced Setup to modify.

4. The fourth screen shows the Temperature Coefficient which can be set from 0.0

to 3.0 % per °C. Default value is 2.1 %/°C [t 2.1%].

See Section 5.5 Advanced Setup to modify.

5. All LCD segments light for 2 seconds before entering measurement mode. Note:

the meter will use the measurement mode that was in use when it was previously
powered off.

Cond 6+

Measurement Mode

m

S

µ

C°

%

pptmV

pH %MINMAXLOHO

FC°°

m

S

µ

S

µ

ON

OFF